Hoisting apparatus.



No. 64|,|35. Patented Ian. 9, l900.

C. W. NASON.

HDISTING APPARATUS.

(Application filed Oct. 4, 1898.)

2 Sh'eets-Sheet I.

(No Model.)

THE rwnms PETERS co, PHoTo-uma, WASHINGTON, o c.

No. 64I,l35. Patented m. 9, 1900. c. w. NASUN.

HDISTING APPARATUS.

(Application filed Oct. 4, 1898.! (No Model.) 2 Sheets-Sheet 2.

I l I II II mz NORRIS PETERS c0. micro-Lima. wAsnmq-mn. 0 c.

TATES GARLETON w. NASON,

OF NEW YORK, N. Y;

HOISTING APPARATUS.

srncrFIcArIoN forming part of Letters Patent no. 641,135, dated d'anuary 9, 19cc;

Application filed October 4, 1 898.

Serial No. 692,595. on model.)

To ctZZ whom it may concern;

Be it known that I, CARLETON W. NASON, a citizen of the United States, residing at New York, county of New York, and State of New York, have invented certain new and useful Improvements in Hoisting Apparatus, fully described and represented in the following specification and the accompanying drawings, forming a part of the same.

This invention relates to improvements in hoisting apparatus of that class which is designed not only to raise loads, but to also transport them from the points at which they are raised to other desired'points.

The invention, generally stated, consistsin apparatus of this character comprising a suitable hoisting-cable or the like, a way, a carrier thereon provided with supports, as a pair of sheaves, over which the hoisting-cable or the like passes and between which it is looped, and means, as a clutch, under the control of the operator for effecting a variation in the relative amount of resistance offered on the opposite sides of said looped por tion to'movement of the cable or the like relatively to the carrier, so that the resistance on what may be termed the draft side of the looped portion of the cable or the like exceeds that on the opposite or rear side thereof, and the carrier as a result is caused to move with the draft end of the cable or the like and relatively to the looped portion thereof, whereby the load sustained from the looped portion of the cable or the like while being raised is also moved from the point from which it is raised to the point at which it is to be delivered. In the particular construction herein illustrated and hereinafter particularly described the carrier is provided with two sheaves journaled therein, over which the hoisting-cable or the like passes and between which the cable or the like is looped, the load raised and transported being suspended from such looped portion. These sheaves are arranged one in advance of the other, and the one on which the clutch or other controlling means acts is that which is next the end of the cable or the like to which power is applied in hoisting.

, In the accompanying drawings, Figure 1 is a side elevation, partly in section, of a hoistsheave. Fig. 3 is a section on the line 3 3 of Fig. 2. Fig. l is a section on the line 4 4 of Fig. 2. Fig. 5 is a detail of the sheave which is to be engaged by the clutch mechanism,

the latter being shown disengaged therefrom,

so that the sheave is free to rotate without restraint.

Referring to said drawings, 1 represents a suitable track or way supported from a suitable framework or the walls or ceiling of a room, 2 a carrier mounted thereon, and 3 two like hoisting cables, ropes, or the like, each secured at its opposite ends to such framework, walls, or ceiling. The carrier 2 is provided with a downwardlyextending bracket 4:, to which are bolted a pair of plates 5 6, between which are journaled at what may be termed the Fdraft and rear ends, respectively, of the carrierapair ofsheaves 7 8, each provided with doublegrooves in its periphery for receiving the hoisting-cables 3 or the like. The cables 3, as will be observed, pass over the sheaves 7 8 and are looped between said sheaves, such looped portions being provided with a pulley-block 9, bearing the usual hook for attachment to the loads to be hoisted,the loads raised being thus suspended between the two sheaves. The block 9 is suitably weighted, so as to counterbalance the weight of the piston 13. Each of the two cables 3 near one of its ends takes two turns around a pair of sheaves 1O 11, the former of which is journaled in the framework of the apparatus or in the wall or ceiling of a room and the latter of which is journaled in the upper end of a piston-rod 12, the piston 13 of which works in a cylinder 14:. At its upper end the cylinder 14 is provided with a pipe 15, connected by means of a pipe 16 with a suitable source of water, air, or steam supply, the admission of which to the cylinder is controlled by means of a three-way valve 1'7, provided with a lever 18, by which said valve is operated. The pipe 15 is also adapted to be thrown into communication with an exhaust or discharge pipe 19 when it is desired that the piston 13 should move upwardly in the cylinder, and the load, it any, supported thereby thus be lowered to the ground. As this power mechanism forms no part of the present invention further description thereof is unnecessary, except to say 'thatin the position in which the lever 18 is shown in Fig. 1 the pipe 15 is in communication with the supply-pipe 16, so thatwater, steam, or air may be admitted to the cylinder, and thus move the piston downwardly therein; that in the reverse position of the lever 18 the pipe 15 is out of communication with the supply-pipe 16 and is in communication with the exhaust or discharge pipe 19, so that the piston 13 is free to move upwardly in the cylinder, while in the mid or horizontal position of the lever 18 the pipe 15 is out of communication with both the supply and discharge pipes 16 19, and the piston 13 thus held stationary. Any other form of power mechanism for operating upon the cable or the like may be employed without departing from the present invention.

Mounted in the plate 5, secured to the carrier 2, is a clutch mechanism adapted to engage the sheave 7, so as to prevent rotation thereof for the purpose of compelling the carrier, and with it the load carried thereby, to move along the way toward the power mechanism. This clutch mechanism consists of a slide 2O, provided with an inwardly-project ing tooth 21, adapted to engage corresponding teeth 22 on the inner periphery of the sheave 7, and when so engaged to prevent rotation of said sheave. This clutch mechanism is designed to be operated by the hand or foot of the attendant in charge of the hoisting apparatus, by means of connections consisting of a lever 23, pivoted in the plate 5 and provided with an arm 24, located between pins 25 26, projecting from the slide 20, the lever 23 being also provided with hand ropes or chains 27, extending downwardly into convenient reach of the attendant and by which said lever is tilted in one direction or the other, as desired, so as to throw the slide 20 into position to engage with or to be disengaged from the teeth 22 on the sheave 7.

The operation of the apparatus is as follows: As the parts are shown in full lines inv Fig. 1, the cylinder 14, as before stated, is in communication with the supply-pipe 16, and the piston 13 is being moved downwardly in the cylinder 14-. As the piston is thus moved it will draw the cables 3 downwardly over the pulley 10, and thus draw the looped portions of said cables from which the load is suspended upwardly toward the carrier 2. If it is desired in addition to raising the load suspended from the looped portions'of the cables to also transport it to some other point, all that is necessary to be done is to move the lever 23 into the position in which it is shown in Figs. 1 and 2, when the arm 24, engaging the pin 25, will move the slide 20 outwardly,

so as to bring its tooth 21 into engagement with oneof the teeth 22 upon the inner periphery of the sheave 7. 'When so engaged with the sheave 7, this clutch mechanism will prevent rotation of said sheave, the resistance to the movement of the cable relatively to the carrier being thus increased at the sheave 7 on the draft side of the looped portion of the cable, while the :sheave 8 on the rear side of said looped portion of the cable is 'left free to rotate, and as a result of this the cables 3 instead of rotating sheave 7 will draw the carrier 2 inwardlyt'. 6., toward the cylinder 14-and move it relatively to the looped portions of the cables, said looped portions in such case rotating and passing behind the rear sheave 8. The load suspended from the cables in such case will be hoisted and at the same time transported inwardly, as illustrated by dotted lines in Fig. 1. When it is desired to merely hoist the load suspended from the cables, the attendant will move the lever 23 into the position shown in Fig. 5, the arm 24 in such case engaging the pin 26 and'moving the slide 20 inwardly toward the axis of the sheave 7 and out of engagement with the teeth 22 thereof.

The present invention is not to belimited to the precise form and arrangement of mechanism shown and described, as changes and modifications may be made in such mechanism without departing from the invention.

It is to be understood that under the term cable as used in the specification and in the accompanying claims is meant to be included cables in the form of wire, rope, chains, or in any other suitable form.

What I claim is- 1. The combination with a hoisting-cable, a way,and a carrier thereon provided with supports over which the cable passes and between which it is looped to sustain the load,o f means for eifecting a variation in the relative amount of resistance offered on opposite sides of said looped portion to movement of the cable, whereby the carrier is caused to move with the draft end of the cable but is free to move relatively to the looped and rear portions thereof, said rear portion being suitably held against movement with the carrier, substantially as described.

2. The combination with a hoisting-cable, a way,and a carrier thereon provided with supports over which the cable passes and between which it is looped to sustain the load, of means for increasing on the draft side of said looped portion the resistance offered to movement of the cable, whereby the carrier is caused to move with the draft end of the cable but is free to move relatively to the looped and rear portions thereof, said rear portion being suitably held against movement with the carrier, substantially as described.

3. The combination with a hoisting-cable, a way, and a carrier thereon provided with a pair of sheaves journaled therein over which the cable passes and between which it is looped to sustain the load, of means for efiecting a variation in the relative amount of resistance offered at said sheaves to movement of the cable relatively to the carrier, whereby the car rier is caused to move with the draft end of the cable but is free to move relatively to the looped and rear portions thereof,said rear portion being suitably held against movement with the carrier, substantially as described.

4. The combination with a hoisting-cable, a way, and a carrier thereon provided with a pair of sheaves journaled therein over which the cable passes and between which itis looped to sustain the load, of means for increasing at the sheave on the draft side of said looped portion the resistance offered to movement of the cable, whereby the carrier is caused to move with the draft end of the cable but is free to move relatively to the looped and rear portions thereof, said rear portion being suitably held against movement with the carrier, substantially as described.

5. The combination with a hoisting-cable, a way, and a carrier thereon provided with a pair of sheaves journaled therein over which the cable passes and between which it is looped to sustain the load, of means for restraining rotation of the sheave on the draft side of said looped portion, the other sheave remaining free to rotate, whereby the carrier is caused to move with the draft end of the cable and relatively to the looped and rear portions thereof, said rear portion being suitably held against movement with the carrier, substantially as described.

6. The combination with a hoisting-cable, a way, and a carrier thereon provided with a pair of sheaves journaled therein over which the cable passes and between which it is looped to sustain the load, of a clutch for restraining rotation of the sheave on the draft side of saidlooped portion, the other sheave remaining free to rotate, whereby the carrier is caused to move with the draft end of the cable and relatively to the looped and rear portion thereof, said rear portion being suitably held against movement with the carrier, substantially as described.

7. The combinationwith a hoisting-cable, a way and a carrier thereon provided with sheaves 7, 8 over which the cable passes and between which it is looped to sustain the load, of clutch 20 restraining rotation of sheave 7 to cause the carrier to movewith the draft end of the cable and relatively to the looped portion thereof, and means for operating said clutch, substantially as described.

8. The combination with a hoisting-cable, a Way and a carrier thereon provided with sheaves 7, 8 over which the cable passes and between which it is looped to sustain the load, of clutch 2O restraining rotation of sheave 7 to cause the carrier to move with the draft end of the cable and relatively to the looped. portion thereof, lever 23, and connections between said lever and clutch, substantially as described.

9. The combination with a hoisting-cable, a way and a carrier thereon provided with sheaves 7, 8 over which the cable passes and between which it is looped to sustain the load, of clutch 20 restraining rotation of sheave 7 to cause the carrier to move with the draft end of the cable and relatively to the looped portion thereof, lever 23, and connections between said lever and clutch, consisting of pins on one and an arm on the other, substantially as described.

10. The combination with a hoisting-cable, a way and a carrier thereon provided with sheaves 7', 8 over which the cable passes and between which it is looped to sustain the load, the sheave 7 being toothed, of clutch 20 adapted to engage the teeth of sheave 7 to cause the carrier to move with the draft end of the cable and relatively to the looped portion thereof, and means for operating said clutch, substantially as described.

11. The combination with a hoisting-cable or the like, a way and a carrier thereon, of sheave 7, clutch 20, lever 23, and connections between said lever and clutch, substantially as described.

12. The combination with a hoisting-cable or the like, a way and a carrier thereon, of sheave 8, clutch 20, lever 23, and connections between said clutch and lever, consisting of pins on one and an arm on the other, substantially as described.

13. The combination with a way and a car rier thereon, of sheaves 7, 8 journaled therein,

a cable 3 passing over the sheaves and looped between them, power mechanism at the end of the cable next the sheave '7, clutch 20 for engaging said sheave 7, and lever 23 and con-' nections for operating such clutch, substantially as described.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

OARLETON W. NASON. Witnesses:

J. J. KENNEDY, T. F. KEHOE. 

